☰ Contents · Mathematics

Sums of several numbers and multi-step expressions (end of Quarter 2)

Lessons 70–74 · 5 lessons · I.V. Repyova, Y.V. Zemlina. Mathematics Grade 1, Parts 1–4. Novda Edutainment, 2023
Answers are for parents and teachers.
1
Work out: 31 + 24 + 13; 9 + 6 + 1; 70 − 30 − 20
2
Work out, minding the brackets: 45 − (15 + 5); (45 − 15) + 5
3
The easy way: 17 + 5 + 3; 24 + 16 + 30
4
Problem: A park has 15 plane trees, 21 maples and 12 poplars. How many trees in all?
5
Quarter 2 review: 9 + 8, 16 − 9, 45 + 32, 87 − 52, 60 + 40