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1.计算。 (1)200-800÷16×3 (2)(375÷75+58)×34 (3)(738+38×9)÷45 (4)4800÷(2560-145×16)2.算一算,连一连。你发现什么规律?3.你能按要求改变它吗?试一试。 (1)把100-(36+540÷18)改变运算顺序,使它的结果等于68。 (2)把285-(15+20×3)改变运算顺序,使它的结果等于330。4.列式计算。 (1)用294除以14的商,去乘32与18的和,积是多少? (2)285与15的和,除以20与3的积,商是多少?5.练跳绳,学数学。 (1)一个课外活动小组有5个同学跳绳,他们用2分钟共跳了1800
Calculate (1) 200-800 ÷ 16 × 3 (375) 75 + 58 × 34 (3) (738 + 38 × 9) ÷ 45 (4) 4800 ÷ (2560-145 × 16) Count, even a What rule do you find? 3. Can you change it as required? Give it a try. (1) Change the order of operations from 100- (36 + 540 ÷ 18) so that its result is equal to 68. (2) Change the order of the 285- (15 + 20x3) so that its result equals 330.4. Column calculation. (1) What is the quotient of the sum of 32 and 18 multiplied by the quotient of 294 divided by 14? (2) What is the quotient of the sum of 285 and 15 divided by the product of 20 and 3? mathematics. (1) An extracurricular activities team skipping five students, who jumped 1800 in 2 minutes