题目内容

【题目】简算。

8.96-(4.96+0.72) 12.34-(2.34-1.99) 37.34-5.55-4.45

25×(8×4) 3.24×101 99×32+3.2×10

287×29+287+287×71 48×7+4.8×13×10 3.64+12.75+5.36-7.25

【答案】3.28 11.99 27.34

800 327.24 3200

28987 960 14.5

【解析】

8.96-(4.96+0.72)

=8.96-4.96-0.72

=4-0.72

=3.28

12.34-(2.34-1.99)

=12.34-2.34+1.99

=10+1.99

=11.99

37.34-5.55-4.45

=37.34-(5.55+4.45)

=37.34-10

=27.34

25×(8×4)

=25×8×4

=25×4×8

=800

3.24×101

=3.24×(100+1)

=3.24×100+3.24

=324+3.24

=327.24

99×32+3.2×10

=99×32+32

=32×(99+1)

=32×100

=3200

287×29+287+287×71

=287×(29+1+71)

=287×101

=287×(100+1)

=28700+287

=28987

48×7+4.8×13×10

=48×7+4.8×10×13

=48×7+48×13

=48×(7+13)

=960

3.64+12.75+5.36-7.25

=3.64+5.36+(12.75-7.25)

=9+5.5

=14.5

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