Small Friends Pond — Lesson 30: Plus 2 and plus 1 practice
Small friends: all the adding →Lesson 30: Abacus plus 2 and plus 1 practice
Level 3, Small Friends Pond. Plus 2 and plus 1, with the friend when you need it. Then beat your best time!
What your child does, card by card
Plus 2 and plus 1 practice. Practice day! PlayBuddy opens the lesson: “Practice time. Let's get quicker and better.”
First a reminder (“Plus 2: 3 back. Plus 1: 4 back.”): the beads build 4, 9, 6, 4, 9 and 5, ring by ring, while your child watches. Top bead down. Then the friend goes back.
Try it: your child works out 3 + 2 and 4 + 1, with a green ring on the next bead to move.
Six sums, fast: a mission of 6 tasks with a clock against your child’s own best time. Your child must work out 4 + 2, 4 + 1, 1 + 2, 3 + 2, 2 + 1 and 4 + 1.
Copy me: the beads show 6, 5 and 3 and your child answers by tapping the drawn fingers, the hands window glowing.
Then the beads hide and the sums 4 + 1, 4 + 2 and 3 + 2 are done in the head, the answer shown on the fingers.
You're ready! Plus 2 and plus 1, fast!
What this lesson trains
About five minutes and 14 answers. Altogether the child makes 14 bead moves (6 with the top bead, 8 with bottom beads). 6 is the top number here. Then 3 quick looks in your head. 6 of the 8 sums need a small friend (“+2 = +5 −3” and “+1 = +5 −4”); the others use free beads.
It starts with doing: work out 3 + 2 and 4 + 1.
Fingers and hands
Below the abacus the drawn hands show zero and 1, 2, 3, 4, 5 and 6 here, finger for bead.
+2 on the fingers: the thumb opens and 3 fingers close (+5 −3). +1 on the fingers: the thumb opens and 4 fingers close (+5 −4).
In Copy me the beads lead with 6, 5 and 3, and your child answers on the fingers: the reverse of making a number on the beads.
What PlayBuddy and PlayType say
PlayBuddy: “Top bead down, small friend off.”
Stars
14 answers: 1 slip still gives three stars; up to 3, two stars.