9.简便计算.
101×93 | 25×39+25 | 23-6.85-3.15 |
38×65-55×38 | 25×32×125 | 22+3.48+6.52+48 |
8.直接写得数.
0 164327 164335 164341 164345 164351 164353 164357 164363 164365 164371 164377 164381 164383 164387 164393 164395 164401 164405 164407 164411 164413 164417 164419 164421 164422 164423 164425 164426 164427 164429 164431 164435 164437 164441 164443 164447 164453 164455 164461 164465 164467 164471 164477 164483 164485 164491 164495 164497 164503 164507 164513 164521 199269
0.15+0.5= | 1.8×6= | 1-0.23= | 2.5×4= |
4.8÷1.6= | 5.1-2= | 3.86×10= | 3.9×0.1= |
2.5×4= | 1-0.55= | 0.32÷2= | 0.8×5= |