★÷0.3=9
★=0.3x9
★=2.7
(△+★)×0.4=2.28
(△+2.7)=2.28÷0.4
△+2.7=5.7
△=3
已知(△+★)×0.4=2.28,★÷0.3=9.那么△=,★=.
1个回答
相关问题
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口算 0.56÷0.7= 4.8×0.1= 0.16÷1.6= 0.28×0.4= 0.9÷0.1= 3.2÷80= 2
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直接写出得数 0.3×0.28=2.4×10=4.2÷0.7=0.78÷0.3=0.125×80=1.2×5=9.1÷0
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口算： 0.36÷4= 4.2÷0.7= 11.6+1.4= 4.8÷8×9= 0.28÷0.4= 0.125×0.8=
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3.56×4.32×1.28÷0.178÷0.64÷2.16
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怎样算简便就怎样算．2.33×0.5×4 44.28÷0.9÷4.1 0.65×201 1.08×0.8÷0.27 9.
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简便计算：（1）3.4×7.8÷3.9（2）85÷0.17÷5（3）0.125×（2.4+0.8）×2.5（4）9.9×
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已知（□+△）×0.3=5.28，△÷0.8=10.5，求□=？△=？
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4.5÷0.9﹦ 2.5×4﹦ 25×3.3×0﹦ 294×3≈ 420÷58≈ 2.5×0.4= 0.3÷0.1﹦ 7
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8÷10= 10-1.8-7.2= 0.43+3.57= 2.5×4×12= 0.9×0.8= 7.28×99+7.28
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口算速算．0.25×4= 5.6×0.2= 4.8÷1.2= 3.8+1.2= 1.72+2.28= 4.5÷0.9=