Work through ten sums, beginning with familiar facts before adding larger tens and ones.
Addition within 100
Your addition round
Ten questions with clear feedback, beginning gently and building to crossing ten.
Addition within 100Question 1 / 10
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Add the tens, then the ones
For 34 + 25, add 30 + 20 = 50, then 4 + 5 = 9. Put the parts together to make 59. The tens and ones keep their places; 34 + 25 is not 3 + 4 + 2 + 5.
When the ones make another ten
For 38 + 27, add 8 + 7 = 15. That is one ten and five ones. Add the extra ten to 30 + 20 to reach 65. Check by estimating: a number near 40 plus one near 30 should be near 70, not 15.
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