计算下列各题,要写出主要计算过程,能用简便方法的要用简便方法计算.①16×18-120÷15②3.2×2.77+0.23×3.2③7.6-2.05÷0.82④78-517+98-1217⑤29-716×29⑥13÷(14+56)×34.-数学
题文
计算下列各题,要写出主要计算过程,能用简便方法的要用简便方法计算.
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答案
①16×18-120÷15, =288-8, =280; ②3.2×2.77+0.23×3.2, =3.2×(2.77+0.23), =3.2×3, =9.6; ③7.6-2.05÷0.82, =7.6-2.5, =5.1; ④
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=2-1, =1; ⑤
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⑥13÷(
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