作业帮几道简便计算题（1）9.81X0.1+0.5X98.1+0.049X981=（2）7.8÷[(9-8.98)X2.5} = 需要简便计算 求求 大家了 要快
来源：学生作业帮助网 编辑：作业帮 时间：2024/05/05 04:46:59
几道简便计算题（1）9.81X0.1+0.5X98.1+0.049X981=（2）7.8÷[(9-8.98)X2.5} = 需要简便计算 求求 大家了 要快
几道简便计算题
（1）9.81X0.1+0.5X98.1+0.049X981
=
（2）7.8÷[(9-8.98)X2.5}
=
需要简便计算 求求 大家了 要快
几道简便计算题（1）9.81X0.1+0.5X98.1+0.049X981=（2）7.8÷[(9-8.98)X2.5} = 需要简便计算 求求 大家了 要快
（1）9.81X0.1+0.5X98.1+0.049X981
=9.81x0.1+5x9.81+4.9x9.81（此处简算）
=9.81x(0.1+5+4.9)
=9.81x10
=98.1
（2）7.8÷[(9-8.98)X2.5}
=7.8÷(0.02x2.5)
=7.8÷0.05
=7.8x20 （此处简算÷0.05,即÷1/20,即x20）
=156
9.81X0.1+0.5X98.1+0.049X981
=9.81X0.1+9.81x5+9.81x4.9
=9.81x(0.1+5+4.9)
=9.81x10
=98.1
7.8÷[(9-8.98)X2.5}
=7.8÷(0.02x2.5)
=7.8÷0.05
=7.8÷1/20
=7.8x20
=156
=9.81X0.1+0.5X9.81X10+9.81X100X0.049
=9.81X0.1+9.81X5+9.81X4.9
=9.81X(0.1+5+4.9)
=9.81X10
=98.1
=7.8÷（0.02X2.5)
=7.8÷(2x2.5x0.01)
=7.8÷(5x0.01)
=7.8÷5x100
=7.8x100÷5
=7.8x20
=18x2=156
（1）=98.1×0.01+0.5×98.1+0. 49×98.1 =98.1×(0.01+0.5+0.49) =98.1 (2)=7.8÷[0.02×2.5] =7.8÷0.05 =156
直接用手机计算器算应该就出来了。