用你喜欢的方法计算,并写出主要的计算过程(1)6.1+(2.9-0.7)-4.3(2)125.125×8(3)(16+27)÷142(4)125×37×8×715(5)(78-316)×(1-19)(6)(35-63×49)÷711.
用你喜欢的方法计算,并写出主要的计算过程 (1)6.1+(2.9-0.7)-4.3 | (2)125.125×8 | (3)(+)÷ |
(4)125××8× | (5)(-)×(1-) | (6)(35-63×)÷. |
答案和解析
(1)6.1+(2.9-0.7)-4.3,
=6.1+2.2-4.3,
=4;
(2)125.125×8,
=(125+0.125)×8,
=125×8+0.125×8,
=1000+1,
=1001;
(3)((
+)÷,
=(+)×42,
=×42+×42,
=7+12,
=19;
(4)125××8×,
=(125×8)×(×),
=1000×,
=200,;
(5)(-)×(1-),
=×,
=;
(6)(35-63×)÷,
=(35-28)÷,
=7×,
=11.
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