五年级上册数学 简便计算期末必考

五年级上册数学 简便计算期末必考


简介:
1.25+4.6+0.75 =(1.25+0.75)+4.6 =2+4.6 =6.6 6.1×3.6+3.6×3.9 =3.6×(6.1+3.9) =3.6×10 =36 5.1×4.6+5.9×4.6-4.6 =4.6×(5.1+5.9-1) =4.6×10 =46 1.25×8.8 =1.25×(8×1.1) =1.25×8×1.1 =10×1.1 =11