小学三年级十进制口算题

4.2+5.7=7.8+5.4=11.4+5.1=15+4.8=18.6+4.5=22.2+4.2=25.8+3.8=29.4+3.4=33+3=36.6+2.6=40.2+2.2=43.8+1.8=47.4+1.4= 51-1.9=54.6-2.4=58.2-2.9=61.8-3.4=65.4-3.9=69-4.4=72.6-4.9=76.2-5.4=79.8-5.9=83.4-6.4=87-6.9=90.6-7.4=94.2-7.9=97.8-8.4=

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