计算. 8.8-
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111×28+999×8 |
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2
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解:8.8-
=8.8-
=(8.8-0.8)-
=8-
=6
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=
=
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=(7.8-2.8-1)×0.75, =4×0.75, =3; 111×28+999×8, =111×28+111×72, =111×(28+72), =111×100, =11100,;
=
=
=7; 2
=(2.75+2.25)+(1
=5+5, =10. |
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