Question 44 of 48intermediate🔧 ApplyNumerical6 marks
Find quick ways of solving. Think about some of the strategies you learnt in Grade 3.
(i)
326 + 25
Answer
326 + 25 = 351
(ii)
675 + 5
Answer
675 + 5 = 680
(iii)
410 - 12
Answer
410 - 12 = 398
(iv)
204 - 10
Answer
204 - 10 = 194
(v)
811 + 99
Answer
811 + 99 = 910
(vi)
945 - 19
Answer
945 - 19 = 926
Explanation
(i) 326 + 20 = 346, then 346 + 5 = 351 (ii) Direct addition: 675 + 5 = 680 (iii) 410 - 10 = 400, then 400 - 2 = 398 (iv) Direct subtraction: 204 - 10 = 194 (v) 811 + 100 = 911, then 911 - 1 = 910 (compensation method) (vi) 945 - 20 = 925, then 925 + 1 = 926 (compensation method)