In this lesson, we will learn how to use whole-part models to help us solve addition and subtraction word problems.
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What calculation is need to solve the following word problem: Sally bought used 13 bricks yesterday. Today she she used another 27. How many bricks did she use altogether?
13+13
27-13
Correct answer: 27+13
27+13
Q2.
Solve the following word problem: Rebecca has 32 shirts in her wardrobe. She gives away 16. How many shirts does she have left?
32-16-15
Correct answer: 32-16=16
32-16=16
32+16=48
Q3.
What is the inverse of the following equation? 52-25=27
27-25=32
Correct answer: 27+25=52
27+25=52
52+25=27
Lesson appears in
UnitMaths / Addition and subtraction of 2-digit numbers (regrouping and adjusting)