Primary school sixth grade off formula calculation. I give 30 wealth (1) 75% of 0.25 * 31 + 49% of 31% (2) 3% of 4 * 4 + 75% * 7-0.75 (3) 13.6 * 40% - 3.6 * 2 / 5 | Math enthusiast | Mathematical art

Primary school sixth grade off formula calculation. I give 30 wealth (1) 75% of 0.25 * 31 + 49% of 31% (2) 3% of 4 * 4 + 75% * 7-0.75 (3) 13.6 * 40% - 3.6 * 2 / 5

(1) 75% of 0.25 * 31 + 49 * 25% of 31
=0.25*（75/31+49/31）
=0.25*4
=1
(2) 4 * 3 / 4 + 75% * 7-0.75
=3/4*（4+7-1）
=3/4*10
=15/2
(3) 13.6 * 40% - 3.6 * 2 / 5
=2/5*（13.6-3.6）
=2/5*10
=4

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