GMy GYM MathMOE-aligned Primary Maths
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P5 · Topic

Whole Numbers

Follow order of operations and estimate before you compute.

Big Idea
Follow order of operations and estimate before you compute.
0.301
Place the value between two known points.
Key points
  1. 1Order: brackets, then × ÷ left to right, then + − left to right.
  2. 2Estimate first so you can spot an unreasonable answer.
  3. 3Divide before multiplying only if it comes first left-to-right.
  4. 4Use brackets to make grouping clear.
Worked example
  1. 1Do ÷ and × before +. 8640 ÷ 24 = 360.
  2. 2175 × 6 = 1050.
  3. 3360 + 1050 = 1410.
Answer: 1410
GYM Teaching Tip
Round each number first. If your final answer is far from the estimate, check the order.
See the question behind this example
Find 8640 ÷ 24 + 175 × 6.