4．口算
0 162354 162362 162368 162372 162378 162380 162384 162390 162392 162398 162404 162408 162410 162414 162420 162422 162428 162432 162434 162438 162440 162444 162446 162448 162449 162450 162452 162453 162454 162456 162458 162462 162464 162468 162470 162474 162480 162482 162488 162492 162494 162498 162504 162510 162512 162518 162522 162524 162530 162534 162540 162548 199269
| 9.7+1.1= | 7.2÷1.2= | 2.85×0.1= | 1.8×0.6= |
| 1.4×0.4= | 2.5×80= | 0.12+8.8= | 6.3-4.7= |
| 0.3×0.3= | 3.24÷0.06= | 0.25×0.4= | 1-0.19= |
| 16×0.25= | 98.4÷100= | 0.64÷0.08= | 2.6÷0.02= |
