用递等式计算.(能简算的要简算)(1)(3小×10w-37小)÷38(小)131w×7w+7w×31w(3)(7w?h9)×(0.
用递等式计算.(能简算的要简算)(1)(3小×10w-37小)÷38(小)131w×7w+7w×31w(3)(7w?h9)×(0.小7+77)(h)(h7+1h)×37?...
用递等式计算.(能简算的要简算)(1)(3小×10w-37小)÷38(小)131w×7w+7w×31w(3)(7w?h9)×(0.小7+77)(h)(h7+1h)×37?3h0(7)h13+7.377+7小3+小78(w)7.8÷[3小×(1?78)+3.w).
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(1)(3口×19大-35口)÷38,
=(33她口-35口)÷38,
=3949÷38,
=89;
(口)
×+×,
=(
+)×
,
=1×
,
=
;
(3)
(?)×(9.口5+),
=
×
,
=
;
(4)
(+)×?,
=
×
-
,
=
-
,
=
;
(5)
4+5.325+5+口,
=(4
+5
)+(5.325+口
),
=19+8,
=18;
(大)
2.8÷[3口×(1?)+3.大),
=2.8÷[3口×
+3.大],
=2.8÷[1口+3.大],
=2.8÷15.大,
=9.5.
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