
脱式计算.21.6-0.8×4÷0.8×4 &n...
脱式计算.21.6-0.8×4÷0.8×42.1×0.5÷4.234×(12÷58)89×[34-(716-14)]....
脱式计算.21.6-0.8×4÷0.8×4 2.1×0.5÷4.234×(12÷58) 89×[34-(716-14)].
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(1)21.6-0.8×4÷0.8×4,
=21.6-(0.8÷0.8)×(4×4),
=21.6-1×16,
=21.6-16,
=5.6;
(2)2.1×0.5÷4.2,
=1.05÷4.2,
=0.25;
(3)
×(
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),
=
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=
;
(4)
×[
-(
-
)],
=
×[
-
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],
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×[
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],
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.
=21.6-(0.8÷0.8)×(4×4),
=21.6-1×16,
=21.6-16,
=5.6;
(2)2.1×0.5÷4.2,
=1.05÷4.2,
=0.25;
(3)
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(4)
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7 |
16 |
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4 |
=
8 |
9 |
3 |
4 |
7 |
16 |
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8 |
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3 |
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7 |
16 |
=
8 |
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7 |
16 |
=
8 |
9 |
9 |
16 |
=
1 |
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