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简便计算0.61x8+0.8x3.910.2x7.6-7.6x0.2

题目详情
简便计算 0.61x8+0.8x3.9 10.2x7.6-7.6x0.2
▼优质解答
答案和解析
0.61x8+0.8x3.9
=0.61×8+8×0.39
=8×(0.61+0.39)
=8×1
=8
10.2x7.6-7.6x0.2
=7.6×(10.2-0.2)
=7.6×10
=76