 # Subtraction Strategies. draw a picture 85 - 12 = Step 1, draw 85. Step 2, mark off 12. Step 3, what is left? 70 + 3 = 73.

## Presentation on theme: "Subtraction Strategies. draw a picture 85 - 12 = Step 1, draw 85. Step 2, mark off 12. Step 3, what is left? 70 + 3 = 73."— Presentation transcript:

Subtraction Strategies

draw a picture 85 - 12 = Step 1, draw 85. Step 2, mark off 12. Step 3, what is left? 70 + 3 = 73

number line - subtracting 45 - 17 = Step 1, draw the number line and place the largest number line on it. 28 303545 Step 2, break the smaller number into parts and subtract them. Double check to make sure you have subtracted the correct amount. -10 -2-5 17 = 10 + 5 + 2

subtract in parts 219 – 125 = _____ Step 1, break the smaller number into parts. 125 = 100 – 10 – 10 – 5 219- 100 = 119 119- 10 = 109 109 – 10 = 99 99 – 5 = 94

make a missing number 519 – 385 = _____ Use what you know about fact families and turn the subtraction problem into an addition problem. 385 + _____ = 519

number line – adding up 55 - 39 = Step 1, use your fact family knowledge to make the subtraction problem an addition problem. 39 49 50 55 Step 2, create a number line and place the small number on the number line. Jump on the number line until you get to the larger number. Step 3, add all your jumps back together. +10+5+1 39+_____=55 10+(1+5)=16 6

expanded form 246 - 127= _____ A B C 30 16 A 200 + 40 + 6 B - 100 + 20 + 7 C100 + 10 + 9 = 119

using negative numbers 232 - 149= _____ A B C A 200 + 30 + 2 B - 100 + 40 + 9 C100 - 10 - 7 = 83

Download ppt "Subtraction Strategies. draw a picture 85 - 12 = Step 1, draw 85. Step 2, mark off 12. Step 3, what is left? 70 + 3 = 73."

Similar presentations