Pango+2011

We are learning to use inverse operations to solve problems.

Sometimes we need to work backwards to solve problems. When we work backwards we have to use inverse operations.

? + 11 - 2 = 24

If we work backwards we need to start at 24, 24 + 2 - 11= 15

Lets check if this is correct... 15 + 11 - 2 = 24

Can you explain what we have actually done to solve this problem?

Lets try this one together... ? +4 - 2 = 14

Give these problems a go... ? + 9 - 12 = 27 ? + 8 - 7 =32

? x 3 + 7 = 34 ? x 4 - 14 = 66

We are learning to identify equivalent fractions and rename them as decimals and percentages.

<span style="color: #008000; font-family: 'Comic Sans MS',cursive; font-size: 160%;">Name the equivalent fraction...
 * 1) 25% = 25/100 = 1/4
 * 2) 0.5 = 5/10 = 50/100 = 1/2
 * 3) 1.75 = 1 3/4 = 1 75/100 = 7/4
 * 4) 10% = 10/100 = 1/10
 * 5) 80% = 80/100 = 8/10

<span style="color: #008000; font-family: 'Comic Sans MS',cursive; font-size: 160%;">Name the equivalent decimal...
 * 1) <span style="color: #800000; font-family: 'Comic Sans MS',cursive; font-size: 140%;">4/10 = 0.4
 * 2) <span style="color: #800000; font-family: 'Comic Sans MS',cursive; font-size: 140%;">20% = 0.2
 * 3) <span style="color: #800000; font-family: 'Comic Sans MS',cursive; font-size: 140%;">4/2 = 2.0
 * 4) <span style="color: #800000; font-family: 'Comic Sans MS',cursive; font-size: 140%;">3/6 = 0.5
 * 5) <span style="color: #800000; font-family: 'Comic Sans MS',cursive; font-size: 140%;">75% = 0.75

<span style="color: #008000; font-family: 'Comic Sans MS',cursive; font-size: 160%;">Name the equivalent percentage... <span style="background-color: #000000; color: #008000; display: block; font-family: 'Arial Black',Gadget,sans-serif; font-size: 160%; text-align: center;">Challenge Convert these decimals and fractions... Can you convert any of these into percentages?
 * 1) 0.6 = 60%
 * 2) 250/1000 = 25%
 * 3) 9/10 = 90 %
 * 4) 1.2 = 120%
 * 5) 0.45 = 45 %



<span style="color: #008000; font-family: 'Comic Sans MS',cursive; font-size: 160%;">Gemma had 32 boxes of lemonade. Each box has got 12 cans of lemonade inside. How many cans of lemonade does she have altogether?

<span style="color: #008000; font-family: 'Comic Sans MS',cursive; font-size: 160%;">10 x 12 = 120 <span style="color: #008000; font-family: 'Comic Sans MS',cursive; font-size: 160%;">20 x 12= 240 <span style="color: #008000; font-family: 'Comic Sans MS',cursive; font-size: 160%;">30 x 12= 360 <span style="color: #008000; font-family: 'Comic Sans MS',cursive; font-size: 160%;">12 x 2 =24 so the answer is 384

<span style="color: #008000; font-family: 'Comic Sans MS',cursive; font-size: 160%;">32 x 10 = 320 <span style="color: #008000; font-family: 'Comic Sans MS',cursive; font-size: 160%;">32 x 2 = 64 <span style="color: #008000; font-family: 'Comic Sans MS',cursive; font-size: 160%;">so the answer is 384

<span style="color: #008000; font-family: 'Comic Sans MS',cursive; font-size: 160%;">Samantha and Amy W are planning a party. They buy 9 boxes of glow sticks. Each box contains 24 glow sticks. How many glow sticks do they have altogether? <span style="color: #008000; font-family: 'Comic Sans MS',cursive; font-size: 160%;">10 x 20 = 200 - 20 = 180 then 9 x4= 36 so the answer is 216. <span style="color: #008000; font-family: 'Comic Sans MS',cursive; font-size: 160%;">or <span style="color: #008000; font-family: 'Comic Sans MS',cursive; font-size: 160%;">20 x 9= 180 then 9 x 4 = 36 added them together so the answer is 216.

<span style="color: #008000; font-family: 'Comic Sans MS',cursive; font-size: 160%;">We are learning to solve multiplication problems by taking some off or putting some on.

<span style="color: #008000; font-family: 'Comic Sans MS',cursive; font-size: 160%;">Try these basic facts... Now try these... <span style="color: #000000; font-family: 'Comic Sans MS',cursive; font-size: 160%;">9 x 9 = 90 x 9 = <span style="color: #000000; font-family: 'Comic Sans MS',cursive; font-size: 160%;">6 x 4 = 24 6 x 40 = 240 <span style="color: #000000; font-family: 'Comic Sans MS',cursive; font-size: 160%;">3 x 8 = 24 30 x 8 = 240 <span style="color: #000000; font-family: 'Comic Sans MS',cursive; font-size: 160%;">4 x 4= 16 4 x 40 = 160 <span style="color: #000000; font-family: 'Comic Sans MS',cursive; font-size: 160%;">5 x 2 = 10 5 x 200= 1,000 <span style="color: #000000; font-family: 'Comic Sans MS',cursive; font-size: 160%;">7 x 7 = 49 700 x 7 = 4,900 <span style="color: #000000; font-family: 'Comic Sans MS',cursive; font-size: 160%;">10 x 10= 100 100 x 10 = 10,000

<span style="color: #000000; font-family: 'Comic Sans MS',cursive; font-size: 160%;">So what is 4 x 19? <span style="color: #000000; font-family: 'Comic Sans MS',cursive; font-size: 160%;">How can we figure out the answer?

<span style="color: #000000; font-family: 'Comic Sans MS',cursive; font-size: 160%;"> 5 x 20 = 100 so what is 5 x 19 and 5 x 21? <span style="color: #000000; font-family: 'Comic Sans MS',cursive; font-size: 160%;">95 & 105

<span style="color: #000000; font-family: 'Comic Sans MS',cursive; font-size: 160%;">4 x 30 = 120 so what is 4 x 28= 112 and 4 x 31= 124

<span style="color: #000000; font-family: 'Comic Sans MS',cursive; font-size: 160%;">6 x 50 = 300 so what is 6 x 52= 312 and 6 x 49= 294

<span style="color: #000000; font-family: 'Comic Sans MS',cursive; font-size: 160%;">7 x 200= 1,400 so what is 7 x 202= 1,414 and 7 x 198= 1,386

<span style="color: #008000; font-family: 'Comic Sans MS',cursive; font-size: 160%;">We are learning to solve problems like 73- 19 by first subtracting a tidy number then adding on a small number to get the answer.

<span style="color: #000000; font-family: 'Comic Sans MS',cursive; font-size: 160%;">Frances frog lives at 73 on the number line. She is capable of of leaps at any size. She wants to make a backward jump of 19.


 * 1) <span style="color: #000000; font-family: 'Comic Sans MS',cursive; font-size: 160%;">123- 18= 105
 * 2) <span style="color: #000000; font-family: 'Comic Sans MS',cursive; font-size: 160%;">228 - 19= 209
 * 3) <span style="color: #000000; font-family: 'Comic Sans MS',cursive; font-size: 160%;">596- 89= 507
 * 4) <span style="color: #000000; font-family: 'Comic Sans MS',cursive; font-size: 160%;">997- 187= 810

72- 59= 13 98- 79= 19  596- 89= 507

991- 87= 904 312- 187= 125  ? + 7995= 9991  9991 - 7995=  9991 - 8000= 1991+ 5 = 1996

<span style="color: #008000; font-family: 'Comic Sans MS',cursive; font-size: 160%;">We are learning to solve some addition and subtraction problems by adjusting one number to the nearest hundred.

Work out $99 + $78

56 + 99=

Use an empty number line to solve these... 67 + 98= 97 + 63= 38 + 298=  123 – 99=  456 – 98=

Work out $98 + $38

Use play money to solve these... 151 – 99= 62 + 98= 97 + 73=  338 – 98=  103 + 197=  295 + 456=

Lets image to solve these
 * 1) 141- 99=
 * 2) 299 + 456=
 * 3) 603- 198=
 * 4) 456-98=
 * 5) 224-94=
 * 1,200-998=

<span style="color: #008000; font-family: 'Comic Sans MS',cursive; font-size: 160%;">We are learning to solve some addition and subtraction problems by adjusting one number to the nearest hundred.

<span style="color: #008000; font-family: 'Comic Sans MS',cursive; font-size: 160%;">We are learning to add mentally the ones and tens separately when appropriate.

<span style="color: #008000; font-family: 'Comic Sans MS',cursive; font-size: 160%;">Tony has $37 and is saving to buy a skateboard costing $79. How much does she need to save?

<span style="font-family: 'Comic Sans MS',cursive; font-size: 160%;">We are learning to solve problems like 13 + __ = 91 by jumping up by a tidy number on a number line then jumping back by a small number.

<span style="font-family: 'Comic Sans MS',cursive; font-size: 160%;">1. 82 + Z = 121

<span style="font-family: 'Comic Sans MS',cursive; font-size: 160%;">Z = 39

<span style="font-family: 'Comic Sans MS',cursive; font-size: 160%;">2. 55 + H = 93

<span style="font-family: 'Comic Sans MS',cursive; font-size: 160%;">H = 38

<span style="font-family: 'Comic Sans MS',cursive; font-size: 160%;">3. 27 + K = 111

<span style="font-family: 'Comic Sans MS',cursive; font-size: 160%;">K = 84