Check: When q = 30 ,
1 2
1 2
× 30 – 5
q – 5 =
PR1ME WEEK 2 I DAY 2
= 15 – 5 = 10
✓
c) Solve Practice s 3 1. Use the balance method to solve these equations. Fill in each with +, –, × or ÷. a) j – 14 = 18 1 2 q – 5 = 10. 1 2 q – 5 + 5 = 10 + 5 q = 15 Add 5 to both sides Practice 3
I can carry out the same operations on both sides until only q is left on one side.
1 2
1 2
q × 2 = 15 × 2
Multiply by 2 on both sides
j – 14 + 14 = 18 +
j =
1
1 2
1 2
q × 2 =
× 2 × q
= q 1
b)
3 f – 19 = 17
q = 30 3 f – 19
= 17
q = 30 is a solution of 1 2
q – 5 = 10.
3 f =
3 f
=
Check: When q = 30 ,
1 2
1 2
× 30 – 5
q – 5 =
f =
= 15 – 5 = 10
✓
11
© 2015 Scholastic Education International (S) Pte Ltd ISBN 978-981-09-0495-1
1 4
c)
g + 11 = 16
1 4
= 16
g + 11
Practice s 3 1. Use the balance method to solve these equations. Fill in each with +, –, × or ÷. a) j – 14 = 18 Practice 3 1 4 g = 1 4 g =
g =
j – 14 + 14 = 18 +
2. Use the balance method to solve these equations.
j =
a)
q + 32 = 51
b) r – 26 = 26
b)
3 f – 19 = 17
= 17
3 f – 19
3 f =
3 f
=
f =
44 Scholar Zone Summer: Math
11
ISBN 978-981-09-0495-1
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