求数学大神这两道题的解答过程,如图 255
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=2.64×250-2.6×250
=250×(2.64-2.6)
=250×0.04
=10
2、原式
=88.8×8.7+11.2×(9.9-1.2)
=88.8×8.7+11.2×8.7
=8.7×(88.8+11.2)
=8.7×100
=870
3、原式
=(12.6÷1.4)×(7.6÷1.9)×(2.32÷2.9)
=9×4×0.8
=28.8
4、原式
=22.222×(777.77+333.33)-3.3333×4444.4
=22.222×1111.1-3.3333×4×1111.1)
=1111.1×(22.222-13.3332)
=1111.1×8.8888
=9876.34568
5、原式
=1.11×(9.99×2+3×3.34)
=1.11×(19.98+10.02)
=1.11×30
=33.3
=250×(2.64-2.6)
=250×0.04
=10
2、原式
=88.8×8.7+11.2×(9.9-1.2)
=88.8×8.7+11.2×8.7
=8.7×(88.8+11.2)
=8.7×100
=870
3、原式
=(12.6÷1.4)×(7.6÷1.9)×(2.32÷2.9)
=9×4×0.8
=28.8
4、原式
=22.222×(777.77+333.33)-3.3333×4444.4
=22.222×1111.1-3.3333×4×1111.1)
=1111.1×(22.222-13.3332)
=1111.1×8.8888
=9876.34568
5、原式
=1.11×(9.99×2+3×3.34)
=1.11×(19.98+10.02)
=1.11×30
=33.3
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