Question

0.26×98－0.74×0.2（简算）

Answer 1

0.26×(98.2-0.2)-0.74×0.2
=0.26x98.2-0.2×(0.26+0.74)
=

追答

原式=0.26x100-0.26x2-0.074x2
=26-2x(0.26+0.074)
=25.332

题目有问题，应是7.4x0.2

0.26x98-7.4x0.2
=0.26x100-0.26x2-0.74x2
=26-2x(0.26+0.74)
=26-2
=24

采纳

Answer 2

(0.26+0.74)×(98+0.2)=1×98.2=98.2

Answer 3

 

Answer 4

25.48-0.148=25.332

Answer 5

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