脫式計算,能簡算的要簡算5 7 1 2 5 4 7 23 14 75 6

2021-04-30 04:23:32 字數 1752 閱讀 6562

1樓:匿名使用者

=5.7+14.75+2.

77-8-6.87+2.5/47.

23=5.7+2.77+14.

75-14.87+0.05=5.

7+2.65+0.05

=8.4

脫式計算,能簡算的要簡算: 46.5×99+46.5 12.5÷2.5÷0.4  2.6×1.9÷2.6×1.9 (7.7+1.54)

2樓:手機使用者

(1)46.5×99+46.5

=46.5×(99+1)

=46.5×100

=4650

(2)12.5÷2.5÷0.4

=12.5÷(2.5×0.4)

=12.5÷1

=12.5

(3)2.6×1.9÷2.6×1.9

=2.6÷2.6×1.9×1.9

=1×1.9×1.9

=3.61

(4)(7.7+1.54)÷0.7

=9.24÷0.7

=13.2

(5)10.8÷[(4.62-1.92)×4]=10.8÷[2.7×4]

=10.8÷10.8

=1(6)2.6×(2.139÷9.3×6.2)=2.6×(0.23×6.2)

=2.6×1.426

=3.7076

脫式計算,能簡算的要簡算.①(35+13)÷75+14②29+5.28+79+4.72③85.7×16+14.3×16④2+48%÷

3樓:流星

①(35+13

)÷75+14

,=14

15÷75+1

4,=23

+14,=1112;

②29+5.28+7

9+4.72,

=(29+79

)+(5.28+4.72),

=1+10,

=11;

③85.7×

內16+14.3×16,

=(85.7+14.3)×容16,

=100×16,

=1600;

④2+48%÷0.6-34,

=2+0.8-34,

=2.8-0.75,

=2.05.

脫式計算.(能簡算的要簡算)①1÷0.25+0.25÷1-2.5×0.1②1+2+3+4+5+6+5+4+3+2+16666662③22×4+24×6+

4樓:度鍍

①1÷0.25+0.25÷1-2.5×0.1,=4+0.25-0.25,

=4+(0.25-0.25),

=4+0,

=4;②1+2+3+4+5+6+5+4+3+2+16666662

,=36

6666662

,=18×2

3333331×2

,=18

3333331;③2

2×4+2

4×6+2

6×8+2

8×10

+210×12,=1

2-14+1

4-16+1

6-18+1

8-110+1

10-112,

=12-112,=5

12;④1÷(1-0.99)-99÷(1-0.999),=1÷0.01-99÷0.001,

=100-99000,

=-98900.

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