13．我要算的又对又快
| 3.6-2.6= | 1.8+4.1= | 4.33+5.66= | 18.7-9.2= | 12.5+7.3= |
| 25.7-12.2= | 4.21+2.24= | 3.6-1.8= | 1-0.6= | 2.5+7.5= |
6．写出各组数的最大公因数和最小公倍数
| 6和12 | 7和8 | 8和12 | 9和15 | 12和10 | 14和35． |
5．算一算，写一写，可要细心哦
0 132214 132222 132228 132232 132238 132240 132244 132250 132252 132258 132264 132268 132270 132274 132280 132282 132288 132292 132294 132298 132300 132304 132306 132308 132309 132310 132312 132313 132314 132316 132318 132322 132324 132328 132330 132334 132340 132342 132348 132352 132354 132358 132364 132370 132372 132378 132382 132384 132390 132394 132400 132408 199269
| 320×10= | 200×4= | 0÷2= | 500÷5= |
| 460÷2= | 85-57= | 10×65= | 36+43= |
| 300÷6= | 800÷4= | 690÷3= | 65+0= |
| 240÷6= | 400÷8= | 720÷8= | 240÷8÷6= |