2.3+23.4+34.5+45.6+56.7+67.8+78.9巧算
2.3+23.4+34.5+45.6+56.7+67.8+78.9巧算
计算123+234+345+456+567+678+789/12.3+23.4+34.5+45.6+56.7+67.8+
巧算:(100+12.3+23.4)×(12.3+23.4+34.5)-(100+12.3+23.4+34.5)×(12
56.7*23.4-567*1.26-108*4.67
45.6*1.23/78.9/456*7.89/123怎么简便计算
4.2.2.3巧算24
此题目如何算简便:12.3+45.6+78.9++98.7+65.4+32.1=333,
56.7乘23.4减567乘1.26减108乘4.67
简便计算. 15.6789÷20÷5 2.8×23.4+11.1×57.6+6.54×28 34.5×8.23-34.5
简便计算:23.5乘5.66减23.4乘5.67 1.2/(1.2/2.3)/(2.3/3.4)/(3.4/4.5)
380/7.6(巧算) 2.3*0.48+0.48*8.7-0.12*4(巧算)
56.7-56.7×90%简算