Question

4.44×9.8×2.5怎么简便计算？

Answer 1

4.44×9.8×2.5=4.44×2.5×9.8=（4+0.4+0.04）×2.5×9.8=（4×2.5+0.4×2.5+0.04×2.5）×9.8=（10+1+0.1）×9.8=11.1×9.8=11.1×（10-0.2）=11.1×10-11.1×0.2=111-2.22=108.78

Answer 2

4.44×9.8×2.5
=1.11×9.8×2.5×4
=1.11×(10-0.2)×(2.5×4)
=1.11×(10-0.2)×10
=11.1×(10-0.2)
=11.1×10-11.1×0.2
=111-2.22

=108.78

Answer 3

4.44×9.8×2.5＝1.11×4×2.5×9.8＝11.1×9.8＝11.1×(10-0.2）＝111-2.22＝108.78

Answer 4

4.44x2.5×9.8＝11.1x（9.8十0.2）一0.2x11.1＝111一2.22＝108.78

Answer 5

4.44×9.8×2.5=1.11×4×9.8×2.5=4×2.5×9.8×1.11=10×9.8×1.11=98×1.11=（100-2）×1.11=100×1.11-2×1.11=111-2.22=108.78