How to calculate the simple calculation of grade 4 mathematics? The answer is 14

How to calculate the simple calculation of grade 4 mathematics? The answer is 14

Let's start with two-thirds of the final result in brackets

The reference answer is 14

Wrong answer or wrong question

2.18 - (10.6-9.52) calculate as simple as possible
And 7.28 + 15.4-10.29 57 * 85 + 57 * 16-57 720% 45

2.18 - (10.6-9.52) = (2.18 + 9.52) - 10.6 = 11.7 - 10.6 = 1.17.28 + 15.4-10.29 = 7.28 + (15.4-10.29) = 7.28 + 5.11 = 12.3957 * 85 + 57 * 16 - 57 = 57 * 85 + 57 * 16 - 57 * 1 = 57 * (85 + 16 - 1) = 57 * 100 = 5700, the last one is 720 divided by

Simple calculation of 0.635 × 13 + 0.52 × 63.5 + 3.5 × 6.35

0.635 × 13 + 0.52 × 63.5 + 3.5 × 6.35 simple calculation = 63.5 × 0.13 + 0.52 × 63.5 + 0.35 × 63.5 = 63.5 × (0.13 + 0.52 + 0.35) = 63.5 × 1 = 63.5,