Grade 1 Math · Level 1, Add & Subtract to 10
Subtract Within 10 Fluently
How the lesson starts: Subtract Within 10 Fluently
Lulu's balloons
Hi there! Meet Lulu the llama. Lulu has a bunch of balloons. Oops, some float up into the sky! Let's find how many she keeps.
Balloons float away
Lulu has 9 balloons. 4 float away. Wheee! Count the ones she still holds. 1, 2, 3, 4, 5. Five balloons! 9 − 4 = 5.
Ten balloons
Lulu has 10 balloons. 6 float away. Count what stays. 1, 2, 3, 4. Four left! 10 − 6 = 4. Watch out! Taking away 0 changes nothing. 7 − 0 = 7.