题目内容
【题目】下列算式怎样算简便就怎样算。
15.25-4.72-5.28 99×(9.3-5.7)+3.6 0.36+9.6÷3.2
3.2×1.25×2.5 3.2×25+680×0.25 36÷[(17.5+1.22)÷26]
【答案】5.25;360;3.36;
10;250;50
【解析】
15.25-4.72-5.28
=15.25-(4.72+5.28)
=15.25-10
=5.25
99×(9.3-5.7)+3.6
=99×3.6 + 3.6
=(99+1)×3.6
=100×3.6
=360
0.36+9.6÷3.2
=0.36+3
=3.36
3.2×1.25×2.5
=(0.8×1.25)×(4×2.5)
=1×10
=10(方法不唯一)
3.2×25+680×0.25
=3.2×25+6.8×25
=(3.2+6.8)×25
=10×25
=250(方法不唯一)
36÷[(17.5+1.22)÷26]
=36÷[18.72÷26]
=36÷0.72
=50