Unit 3 Math Test Review

How do you find missing numbers and rules in "What's My Rule?" tables?

• 14, 0, 9, 28, 28

• 0, 10, 29, 43

• 49, 56, 11, 7

• 0, 14, 5, 11, 29

How do you find missing numbers and rules in "What's My Rule?" tables?

• multiply by 8, answers:160, 7, 4

• add 8, answers: 28, 46, 29

• add 8, answers: 14, 54, 46

• subtract 8, answers: 12, 60, 45

Use rounding to estimate and then solve. then, use your estimates to check if your answers make sense. Show your work.

• 180+40=220, 211

• 200-100=100, 128

• 190+30=220, 211

• 200-100=100, 228

• 300+300=600, 681

• 300-300=0, 681

• 300+300=600, 581

• 300-300=0, 581

Solve the addition problems using partial sums. Use your estimates to make sure your answer makes sense.

• 200-100=100, 228

• 200+100=300, 328

• 200-100=100, 328

• 200+100=300, 228

Solve the addition problems using partial sums. Use your estimates to make sure your answer makes sense.

• 300+300=600, 481

• 300+300=600, 581

• 300-300=100, 581

• 300-300=0, 81

• 90+30=120, 124

• 90+40=130, 134

• 100+40=140, 134

• 100+40=140, 124

• 600-600=0, 0

• 800-500=300, 205

• 700-500=200, 205

• 700-500=200, 198

• They added wrong.

• They forgot to cross out the 100 when they borrowed it to make the 10.

• Because they're wrong.

• The answer is right!

• 0, 5, 10, 15, 20, 25, 30

• 0, 10, 20, 30, 40, 50, 60

• 10, 20, 30, 40, 50, 60

• 0, 1, 2, 3, 4, 5, 6