1、新人教版数学一年级下册,十几减8、7、6的练习,退位减，我会算：十几减9，几加1，十几减8，几加2， 十几减7，几加3， 十几减6，几加4，,=5,=9,=4,=3,=6,13-8=5,16-8=8,9-8=1,11-8=3,17-8=9,12-8=4,14-8=6,18-8=10,15-8=7,138=5,158=7,168=8,128=4,118=3,148=6,178=9,108=2,127=5,147=7,167=9,137=6,117=4,157=8,116=5,156=9,146=8,166=10,136=7,138=5,158=7,168=8,128=4,118=3,148=6,
2、178=9,108=2,127=5,147=7,167=9,137=6,117=4,157=8,116=5,156=9,146=8,166=10,136=7,127=,118=,136=,157=,189=,167=,7 + 5=,178=,146=,8 + 9=,116=,159=,5,3,7,8,9,9,12,9,8,17,5,7,157=,5,6,7,8,6,7,=,=6,=5,=7,=8,=7,=6,=8,=4,=7,=5,=5,=7,=8,=6,=4,5,8,9,11-6=5,15-7=8,18-9=9,12,-,6,6,6, ,7,12,9,2,14,18,15,7,6,14,4,13,15,8,7,9,6,15,一个数加上7，它的得数比15小比11大，请问这个数是几？,谁最聪明,14 13 12,答：这个数可以是5、6、7。,（ ）+ 7 = 13,（ ）+ 7 = 14,（ ）+ 7 = 12,7,6,5,
