0.26乘以9.8减0.74乘以0.2的简便运算、
问题描述：
0.26乘以9.8减0.74乘以0.2的简便运算、
答
0.26*10-（0.74+0.26）*0.2 =2.6-0.2=2.4
答
0.26 * 9.8 - 0.74 * 0.2
= 0.26 *9.8 - （1 -0.26） *0.2
= 0.26* （9.8 +0.2） - 1*0.2
=2.6 - 0.2
= 2.4
答
0.26乘以9.8减0.74乘以0.2
=0.26x9.8-0.74x0.2
=0.26x9.8-（1-0.26）x0.2
=0.26x9.8-0.2+0.2x0.26
=0.26（9.8+0.2）-0.2
=0.26x10-0.2
=2.6-0.2
=2.4
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