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脱式计算,能简算的要简算.9.07-0.07×211×0.24-0.243.4×7.8÷3.979.8×10138.8÷0.5÷2(12.4+16.8)÷4.

题目详情
脱式计算,能简算的要简算.
9.07-0.07×2            11×0.24-0.24           3.4×7.8÷3.9
79.8×101               38.8÷0.5÷2           (12.4+16.8)÷4.
▼优质解答
答案和解析
(1)9.07-0.07×2
=9.07-0.14
=8.93

(2)11×0.24-0.24
=(11-1)×0.24
=10×0.24
=2.4

(3)3.4×7.8÷3.9
=3.4×(7.8÷3.9)
=3.4×2
=6.8

(4)79.8×101
=79.8×(100+1)
=79.8×100+79.8
=7980+79.8
=8059.8

(5)38.8÷0.5÷2
=38.8÷(0.5×2)
=38.8÷1
=38.8

(6)(12.4+16.8)÷4
=12.4÷4+16.8÷4
=3.1+4.2
=7.3