4.6×2.5=×
2.5×(1.38×0.4)=×(×)
2.64×10.1=×+×
8.6×99=×(-) (2.5×1.7)×=1.7×(×4)
3.8+5.46+2.2
2.8×0.5+0.1×2.8
0.25×7.9×0.4
8.56×101-8.56
①5.6-0.71-0.29
②14.56-2.99
③6.23-2.36+3.5-0.64
④6.48×99+6.48
⑤6000÷125÷8
⑥15×24×125