珠心算练习题200题
珠心算练习题
珠心算练习题（一）：
4以内直加直减练习
2-1+1= 4-2+1= 4-3+2-1+2= -1+3-2+3= 33-22= 1+2+1= 3-1+2= 2+1-1+2-3= +3-2+2-1= 1+22= 2-1+2= 4-3+2= 4-2+1-2+3= +3-2+1-1= 33-11= 4-2+2= +2-2= 4-1-2+1+2= 3-1+2-2+1= 44-33= 3+1-2= 2+2-3=
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