Equalities and inequalities, operations on the number ray, simple equations
Answers are for parents and teachers.
1
Solve the equation x × 6 = 54.
9
2
Solve 700 − y = 250 and check.
450
3
Use the number ray to calculate: 15 − 6 + 9 − 4.
14
4
A child runs 4 m per second. How many seconds does she need for 36 m?
9
5
A rectangle has length a = 9 m and width b = 6 m. Find the value of a × 2 + b × 2.
30