Page 25 - Whole Numbers (Addition and Subtraction)

3.9 Solve problems

1. In each question below you will compare two sticks. You
can make rough drawings to help you to think about the
questions.
(a) One stick is 153 cm long and the other stick is 78 cm
shorter.
How long is the shorter stick?
How long are the two sticks together?

(b) One stick is 364 cm long and the other stick is 118 cm
long.
What is the difference between the lengths?
How long are the two sticks together?

(c) The longer of two sticks is 387 cm long and the difference
between the lengths of the two sticks is 185 cm.
How long is the shorter stick?
How long are the two sticks together?

2. 276 m of the road from the school You can sometimes
gate to the office is tarred. The total make rough drawings
distance is 349 m. to help you to
understand questions.
(a) Estimate, to the nearest 100 m,
how much of the road still needs to
be tarred.
(b) Estimate, to the nearest 10 m, how much of the road
still needs to be tarred.

(c) Calculate exactly how much of the road still needs to be
tarred.

(d) How far out was your estimate in (a)?

(e) How far out was your estimate in (b)?

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