Select 2 strategies that we can use to add 115+497

A. Add 110+492

B. Add 115+500 then subtract 3

C. Add 112+500

Question

Lea Thornton

Mathematics

23 May, 02:10

Select 2 strategies that we can use to add 115+497

A. Add 110+492

B. Add 115+500 then subtract 3

C. Add 112+500

+3

Answers (1)

Know the Answer?

Graham Bentley · Answer 1

B. Add 115+500 then subtract 3

C. Add 112+500

Step-by-step explanation:

Any strategy that gives a sum of 612 will work. Strategy A gives a sum of 602, so is not useful.

The appropriate choices are B and C.

B: 115 + 497 = 115 + (500 - 3) = (115 + 500) - 3

C: 115 + 497 = 115 + 497 - 3 + 3 = (115 - 3) + (497 + 3) = 112 + 500

Select 2 strategies that we can use to add 115+497A. Add 110+492B. Add 115+500 then subtract 3C. Add 112+500

Select 2 strategies that we can use to add 115+497

A. Add 110+492

B. Add 115+500 then subtract 3

C. Add 112+500