,第3课时整十数加一位数及相应的减法,第三单元认识100以内的数,(1)40是()个十(2)45里面有()个十和()个一,4个十和5个一是()(3)38里面有()个十和()个一,3个十和8个一是(),2口算,1填空:,63,58,94,157,89,156,146,46,4,4,5,45,3,8,38,9,13,5,8,17,9,8,10,304,430,3430,344,34,34,4,30,加数,加数,和,被减数,减数,差,6,46,6,40,46,46,40,6,46,6,40,63,63,3,60,59,59,50,9,4,37,72,50,78,78,8,70,68,4,78,78,8,39,47,58,2,60,8,5.写出相邻的两个数。(),68,()(),81,()(),99,(),69,67,82,80,100,98,4,20,24,38,30,8,50,11,22,33,44,55,66,77,88,99,3,5,35,5,2,52,85,6,26,6,