0.76*52+4.8*7.6简便计算 78.1*54.3+45.45*78.1+78.2/4简便计算快,

0.76*52+4.8*7.6简便计算 78.1*54.3+45.45*78.1+78.2/4简便计算快,
0.76*52+4.8*7.6简便计算 78.1*54.3+45.45*78.1+78.2/4简便计算
快,

0.76*52+4.8*7.6简便计算 78.1*54.3+45.45*78.1+78.2/4简便计算快,
0.76×52+4.8×7.6
=7.6×(5.2+4.8)
=7.6×10
=76
78.1×54.3+45.45×78.1+78.2÷4
=78.1×54.3+45.45×78.1+(78.1+0.1)÷4
=78.1×54.3+45.45×78.1+78.1÷4+0.1÷4
=78.1×(54.3+45.45+1/4)+1/40
=78.1×100+0.025
=7810.025

0.76*52+4.8*7.6
=0.76*52+48*0.76
=0.76*(52+48）
=0.76*100
=76
78.1*54.3+45.45*78.1+78.2/4
=78.1*54.3+45.45*78.1+78.1*1/4+0.1/4
=78.1*(54.3+45.45+0.25)+0.025
=78.1*100+0.025
=7810.025

0.76*52+4.8*7.6=7.6*5.2+4.8*7.6=(5.2+4.8)*7.6=10*7.6=76
78.1*54.3+45.45*78.1+78.2/4=78.1*(54.3+45.45)+(78.1+0.1)*0.25=78.1*(54.3+45.45+0.25)+0.025=78.1*100+0.025=7810.025

他们都是对的