①1.8+3.85+1.2+6.15
②×47+×52
③1.25×32×0.25
+÷+ 43×-31÷ (90+)×
++++……+
①1.25×3.2×2.5
②×[0.75﹣()]
③×()
④2022×
⑤55×102+646÷38
803-207= ÷5= 798+150= + =
0.25×8= 1.5- = 7.5÷ = 0.77+0.3=
9.8-8= × = 45.54÷45= 24× =